Table 2.
Likelihood of having a quit attempt with no support (n = 3848), using prescription medication (n = 2732), and asking a doctor for advice or help to quit (n = 3843) by demographic and smoking characteristics: logistic regressions with predictive margins (%) and average marginal effects (AME).
| No Support |
Used Prescription medication (2002–2017) |
Asked doctor for advice or help to quit |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Logistic Regression |
Predictive margins |
AME^ |
Logistic Regression |
Predictive margins |
AME^ |
Logistic Regression |
Predictive margins |
AME^ |
||||
| aOR (95%CI) | p-value | % (95%CI) | p-value | aOR (95%CI) | p-value | % (95%CI) | p-value | aOR (95%CI) | p-value | % (95%CI) | p-value | |
| Year | 0·97 (0·95–0·99) | 0·001 | 1·06 (1·02,1·10) | 0·001 | 1·07 (1·04,1·10) | <0·0001 | ||||||
| Age group (years) | ||||||||||||
| 15–29 | Ref | 57·0 (53·7,60·4) | Ref | 8·6 (6·2,11·0) | Ref | 17·0 (14·5,19·6) | ||||||
| 30–44 | 0·55 (0·45,0·67) | <0·0001 | 43·7 (40·8,46·5) | <0·0001 | 2·36 (1·63,3·42) | <0·0001 | 17·5 (14·7,20·4) | <0·0001 | 1·74 (1·37,2·20) | <0·0001 | 25·7 (23·1,28·3) | <0·0001 |
| 45–59 | 0·59 (0·48,0·74) | <0·0001 | 45·3 (41·6,48·9) | <0·0001 | 2·75 (1·87,4·02) | <0·0001 | 19·7 (16·4,22·9) | <0·0001 | 1·83 (1·42,2·35) | <0·0001 | 26·6 (23·5,29·7) | <0·0001 |
| 60+ | 0·67 (0·52,0·87) | 0·003 | 48·2 (43·4,52·9) | 0·003 | 2·41 (1·57,3·69) | 0·0001 | 17·8 (13·9,21·7) | 0·0001 | 1·86 (1·39,2·48) | <0·0001 | 26·9 (22·8,30·9) | 0·0001 |
| Gender | ||||||||||||
| Female | Ref | 45·2 (42·8,47·5) | Ref | 16·0 (13·9,18·0) | Ref | 27·0 (24·9,29·1) | ||||||
| Male | 1·37 (1·17,1·59) | 0·0001 | 52·0 (49·4,54·6) | 0·0001 | 0·72 (0·35,1·49) | 0·378 | 15·4 (13·2,17·7) | 0·741 | 0·67 (0·56,0·80) | <0·0001 | 20·4 (18·3,22·5) | <0·0001 |
| Male by year | – | – | 1.02 (0.97, 1.08) | 0.408 | – | – | – | – | ||||
| Socioeconomic disadvantage | ||||||||||||
| Most | 1·31 (0·98,1·76) | 0·072 | 50·1 (47·6,52·5) | 0·117 | 1·05 (0·81,1·36) | 0·692 | 16·0 (14·0,18·0) | 0·691 | 1·27 (1·06,1·53) | 0·011 | 25·2 (23·2,27·3) | 0·010 |
| Least | Ref | 47·2 (44·5,49·9) | Ref | 15·3 (12·9,17·8) | Ref | 21·3 (19·0,23·5) | ||||||
| Most by Year | 0·98 (0·96,1·01) | 0·278 | NS | – | – | – | – | |||||
| Region | ||||||||||||
| Metropolitan | Ref | See Fig. 4a & Supp Table 3 | Ref | 14·7 (12·9,16·5) | Ref | 23·9 (22·1,25·7) | ||||||
| Country | 1·47 (1·05,2·06) | 0·024 | 1·25 (0·95,1·63) | 0·107 | 17·5 (14·5,20·5) | 0·118 | 0·93 (0·76,1·14) | 0·473 | 22·7 (19·9,25·5) | 0·469 | ||
| Country by Year | 0·97 (0·94,1·00) | 0·064 | – | – | – | – | ||||||
| Heaviness of smoking (Cigarettes per day) | ||||||||||||
| 10 or fewer | Ref | 59·0 (56·3,61·7) | Ref | 9·5 (7·7,11·3) | Ref | |||||||
| More than 10 | 0·39 (0·33,0·46) | <0·0001 | 37·5 (35·1,39·9) | <0·0001 | 2·73 (2·08,3·58) | <0·0001 | 21·6 (19·1,24·1) | <0·0001 | 2·82 (1·96,4·06) | <0·0001 | See Fig. 4b & Supp Table 5 | |
| Quantity not provided | 2·20 (1·49,3·24) | 0·0001 | 75·1 (68·4,81·7) | <0·0001 | 0·69 (0·30,1·63) | 0·401 | 6·9 (1·7,12·0) | 0·340 | 0·57 (0·20,1·61) | 0·288 | ||
| More than 10 by Year | – | – | – | – | 0·98 (0·95,1·01) | 0·146 | ||||||
| Qty not provided by Year | – | – | – | – | 1·00 (0·93,1·08) | 0·950 | ||||||
| Quit intentions in next 6 months | ||||||||||||
| Intend to quit | Ref | 44·4 (42·3,46·5) | Ref | 16·6 (14·8,18·5) | Ref | 26·2 (24·4,28·1) | ||||||
| Do not intend to quit | 2·21 (1·81,2·71) | <0·0001 | 62.0 (58·1,65·8) | <0·0001 | 0.72 (0.51,1.01) | 0.060 | 12·8 (9·5,16·1) | 0·045 | 0·47 (0·36,0·61) | <0·0001 | 15.0 (12·1,17·9) | <0·0001 |
| Can't say | 1·65 (1·26,2·17) | 0·0003 | 55·6 (49·8,61·3) | 0·0003 | 0·78 (0·49,1·24) | 0·300 | 13·7 (8·8,18·6) | 0·271 | 0·66 (0·49,0·90) | 0·008 | 19·5 (15·2,23·8) | 0·004 |
| Mental health condition | ||||||||||||
| No | Ref | 43·8 (41·0,46·5) | Ref | 16·8 (14·7,18·9) | Ref | 25·4 (23·0,27·8) | ||||||
| Yes | 0·74 (0·56,0·97) | 0·032 | 37·2 (31·9,42·6) | 0·029 | 1·05 (0·76–1·48) | 0·767 | 17·4 (13·6,21·3) | 0·769 | 1·82 (1·39,2·38) | <0·0001 | 37·2 (32·1,42·3) | <0·0001 |
^
Comparing percentage point difference in predictive margins compared to reference group for average values when no interaction is present (AME). Representative values for the years of 1998, 2007 and 2017 are available in the Supplementary data file. Notes: aOR=adjusted Odds Ratio, 95%CI=95% Confidence Interval Lower and Upper.